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|
import random
import time
import pytest
from flask_caching import Cache
try:
import redis # noqa
HAS_NOT_REDIS = False
except ImportError:
HAS_NOT_REDIS = True
def test_cache_set(app, cache):
cache.set("hi", "hello")
assert cache.get("hi") == "hello"
def test_cache_has(app, cache):
cache.add("hi", "hello")
assert cache.has("hi")
def test_cache_add(app, cache):
cache.add("hi", "hello")
assert cache.get("hi") == "hello"
cache.add("hi", "foobar")
assert cache.get("hi") == "hello"
def test_cache_delete(app, cache):
cache.set("hi", "hello")
cache.delete("hi")
assert cache.get("hi") is None
def test_cache_delete_many(app, cache):
cache.set("hi", "hello")
cache.delete_many("ho", "hi")
assert cache.get("hi") is not None
@pytest.mark.skipif(HAS_NOT_REDIS, reason="requires Redis")
def test_cache_unlink(app, redis_server):
cache = Cache(config={"CACHE_TYPE": "redis"})
cache.init_app(app)
cache.set("biggerkey", "test" * 100)
cache.unlink("biggerkey")
assert cache.get("biggerkey") is None
cache.set("biggerkey1", "test" * 100)
cache.set("biggerkey2", "test" * 100)
cache.unlink("biggerkey1", "biggerkey2")
assert cache.get("biggerkey1") is None
assert cache.get("biggerkey2") is None
def test_cache_unlink_if_not(app):
cache = Cache(config={"CACHE_TYPE": "simple"})
cache.init_app(app)
cache.set("biggerkey", "test" * 100)
cache.unlink("biggerkey")
assert cache.get("biggerkey") is None
cache.set("biggerkey1", "test" * 100)
cache.set("biggerkey2", "test" * 100)
cache.unlink("biggerkey1", "biggerkey2")
assert cache.get("biggerkey1") is None
assert cache.get("biggerkey2") is None
def test_cache_delete_many_ignored(app):
cache = Cache(config={"CACHE_TYPE": "simple", "CACHE_IGNORE_ERRORS": True})
cache.init_app(app)
cache.set("hi", "hello")
assert cache.get("hi") == "hello"
cache.delete_many("ho", "hi")
assert cache.get("hi") is None
def test_cache_cached_function(app, cache):
with app.test_request_context():
@cache.cached(1, key_prefix="MyBits")
def get_random_bits():
return [random.randrange(0, 2) for i in range(50)]
my_list = get_random_bits()
his_list = get_random_bits()
assert my_list == his_list
time.sleep(2)
his_list = get_random_bits()
assert my_list != his_list
def test_cache_cached_function_with_source_check_enabled(app, cache):
with app.test_request_context():
@cache.cached(key_prefix="MyBits", source_check=True)
def get_random_bits():
return [random.randrange(0, 2) for i in range(50)]
first_attempt = get_random_bits()
second_attempt = get_random_bits()
assert second_attempt == first_attempt
# ... change the source to see if the return value changes when called
@cache.cached(key_prefix="MyBits", source_check=True)
def get_random_bits():
return {"val": [random.randrange(0, 2) for i in range(50)]}
third_attempt = get_random_bits()
assert third_attempt != first_attempt
# We changed the return data type so we do a check to be sure
assert isinstance(third_attempt, dict)
# ... change the source back to what it was original and the data should
# be the same
@cache.cached(key_prefix="MyBits", source_check=True)
def get_random_bits():
return [random.randrange(0, 2) for i in range(50)]
forth_attempt = get_random_bits()
assert forth_attempt == first_attempt
def test_cache_cached_function_with_source_check_disabled(app, cache):
with app.test_request_context():
@cache.cached(key_prefix="MyBits", source_check=False)
def get_random_bits():
return [random.randrange(0, 2) for i in range(50)]
first_attempt = get_random_bits()
second_attempt = get_random_bits()
assert second_attempt == first_attempt
# ... change the source to see if the return value changes when called
@cache.cached(key_prefix="MyBits", source_check=False)
def get_random_bits():
return {"val": [random.randrange(0, 2) for i in range(50)]}
third_attempt = get_random_bits()
assert third_attempt == first_attempt
def test_cache_accepts_multiple_ciphers(app, cache, hash_method):
with app.test_request_context():
@cache.cached(1, key_prefix="MyBits", hash_method=hash_method)
def get_random_bits():
return [random.randrange(0, 2) for i in range(50)]
my_list = get_random_bits()
his_list = get_random_bits()
assert my_list == his_list
time.sleep(2)
his_list = get_random_bits()
assert my_list != his_list
def test_cached_none(app, cache):
with app.test_request_context():
from collections import Counter
call_counter = Counter()
@cache.cached(cache_none=True)
def cache_none(param):
call_counter[param] += 1
return None
cache_none(1)
assert call_counter[1] == 1
assert cache_none(1) is None
assert call_counter[1] == 1
cache.clear()
cache_none(1)
assert call_counter[1] == 2
def test_cached_doesnt_cache_none(app, cache):
"""Asserting that when cache_none is False, we always
assume a None value returned from .get() means the key is not found
"""
with app.test_request_context():
from collections import Counter
call_counter = Counter()
@cache.cached()
def cache_none(param):
call_counter[param] += 1
return None
cache_none(1)
# The cached function should have been called
assert call_counter[1] == 1
# Next time we call the function, the value should be coming from the cache…
# But the value is None and so we treat it as uncached.
assert cache_none(1) is None
# …thus, the call counter should increment to 2
assert call_counter[1] == 2
cache.clear()
cache_none(1)
assert call_counter[1] == 3
def test_cache_forced_update(app, cache):
from collections import Counter
with app.test_request_context():
need_update = False
call_counter = Counter()
@cache.cached(1, forced_update=lambda: need_update)
def cached_function(param):
call_counter[param] += 1
return 1
cached_function(1)
assert call_counter[1] == 1
assert cached_function(1) == 1
assert call_counter[1] == 1
need_update = True
assert cached_function(1) == 1
assert call_counter[1] == 2
def test_cache_forced_update_params(app, cache):
from collections import Counter
with app.test_request_context():
cached_call_counter = Counter()
call_counter = Counter()
call_params = {}
def need_update(param):
"""This helper function returns True if it has been called with
the same params for more than 2 times
"""
call_counter[param] += 1
call_params[call_counter[param] - 1] = (param,)
return call_counter[param] > 2
@cache.cached(1, forced_update=need_update)
def cached_function(param):
cached_call_counter[param] += 1
return 1
assert cached_function(1) == 1
# need_update should have been called once
assert call_counter[1] == 1
# the parameters used to call need_update should be the same as the
# parameters used to call cached_function
assert call_params[0] == (1,)
# the cached function should have been called once
assert cached_call_counter[1] == 1
assert cached_function(1) == 1
# need_update should have been called twice by now as forced_update
# should be called regardless of the arguments
assert call_counter[1] == 2
# the parameters used to call need_update should be the same as the
# parameters used to call cached_function
assert call_params[1] == (1,)
# this time the forced_update should have returned False, so
# cached_function should not have been called again
assert cached_call_counter[1] == 1
assert cached_function(1) == 1
# need_update should have been called thrice by now as forced_update
# should be called regardless of the arguments
assert call_counter[1] == 3
# the parameters used to call need_update should be the same as the
# parameters used to call cached_function
assert call_params[1] == (1,)
# this time the forced_update should have returned True, so
# cached_function should have been called again
assert cached_call_counter[1] == 2
def test_generator(app, cache):
"""test function return generator"""
with app.test_request_context():
@cache.cached()
def gen():
return (str(time.time()) for i in range(2))
time_str = gen()
time.sleep(1)
assert gen() == time_str
@cache.cached()
def gen_yield():
yield str(time.time())
yield str(time.time())
time_str = gen_yield()
time.sleep(1)
assert gen_yield() == time_str
|
